Oil burner



Feb. 26, 1946. CASTLE 2,395,655

OIL BURNER Filed Aug. 20. 1945 yd I Caaile fa Z6 1&5 .dg

Patented Feb. 26, 1946 01L BURNER Boyd F. Castle, Quincy, m., assignorto The Quincy Stove Manufacturing Company, Quincy, 111., a corporationof Illinois Application August 20, 1943, Serial No. 499,312

2 Claims. (CL 158-91) This invention relates to oil burners and has foran object the provision of a device of that character which isefficient, economical and clean in operation. It is characterized by theprovision of a mixing chamber into which the air for combustion is drawnor forced in jets which mix with the gas r fuel vapor, drawn into themixing chamber by the aspirating action of the jets and the mixture isin turn jetted into the combustion chamber. A novel and valuable featureof my new burner is the provision of a ring or collar, below all of theair holes and above the fuel oil.

In the accompanying drawing, I have illustrated one embodiment of myinvention.

Figure 1 is a vertical sectional view of a burner constructionillustrative of the invention; and

Figure 2 is a broken top plan view of the structure shown in Fig. 1.

Like numerals refer to like elements throughout the drawing in which lindicates a heating drum, having a bottom ll, centrally apertured at Ila for admission of air for combustion. Mounted within the drum I0, isthe burner proper, comprising a shell I! surrounded by and spaced from asleeve l3. The shell-l2 is provided with a plurality of apertures Ho andthe sleeve i3 is similarly provided with a plurality of smallerapertures i3a, in alignment with apertures l2a.

The sleeve is provided with a bottom I3b with which it forms a pot forthe reception of fuel oil. Projecting inwardly and downwardly from shellI! below the apertures l2a therein, is a ring 20, centrally aperturedfor flow of air at Ma. This ring lies above the pot bottom I3b.

A. partition il extends from sleeve iii, inwardly thereof and below theuppermost row or rows of apertures l3a, the partition being alsoarranged to close the space between the sleeve and shell at the topthereof, such space constituting a mixing chamber. Partition I1 isextended inwardly of the shell l2 at the top thereof and coacts with anoverlying plate l8 to form a chamber having inwardly-directed apertures18a to direct air into the gases arising from the combustion chamberwhich is formed by the shell l2.

Oil or other fuel under such regulation or control as may be providedflows into the pot through duct 22.

It is to be understood that the apparatus, illustrated and described,may be mounted in any suitable housing for heating purposes and may beoperated under natural or forced draft or both.

In the operation of my device, when oil is supplied to the pot andignited, air will flow inwardly through apertures i3a into the mixingchamber and. therefrom through the apertures i2a into the combustionchamber. This flow sets up an aspirating action which induces a flow ofgas or vapor from the bottom of the pot beneath the ring 20 into themixing chamber where it mixes with the air and the mixture is jettedinto the combustion chamber where it burns. The flames are clean and.the combustion is efiicient. The height of the zone of com-. bustiondepends upon the amount of fuel supplied. With a limited supply of oil aclean pilot fire may be maintained which will automatically increase involume with an increase in fuel sup- P y- .At high fire, if any unburnedgas is rising from the pot, it will be scavenged by the pure air flowingthrough apertures Illa.

I do not wish to be limited to the specific embodiment shown anddescribed except as the claims, properly evaluated with respect to theprior art may so limit them.

What I claim is:

1. An oil burner comprising a pot member having an imperforate bottomand a vertical wall constituting a sleeve, means to supply oil to saidpot, a shell coaxial with and spaced from said sleeve, said shellterminating short of the bottom of said pot member and defining acombustion chamber, said sleeve and shell forming a mixing chambersubstantially co-extensive with said combustion chamber and beingprovided with aligned apertures constructed for cooperation to formaspirating means, said apertures being spaced vertically andhorizontally in said sleeve arid shell, said mixing chamber being incommunication with the interior of said pot at its lower end, means toclose said mixing chamber at the top thereof, and a ring extendinginwardly from said shell below the lowermost apertures therein andoverlying a portion of the bottom of said pot, whereby in normal op- 1eration air flowing through the apertures in said sleeve and shell willform aspirating jets thereby inducing oil vapor from said pot into saidmixing chamber and into combustible mixture with said air, said mixturebeing aspirated into said combustion chamber.

2. An oil burner comprising a pot member having an imperforate bottomand a vertical wall constituting a sleeve, means to supply oil to saidpot, a shell coaxial with and spaced from said sleeve, said shellterminating short of the bottom of said pot member and defining acombustion chamber, said sleeve and shell forming a mixing chambersubstantially co-extensive with said combustion chamber, and beingprovided with aligned apertures constructed for cooperation to formaspirating means, said apertures being spaced vertically andhorizontally. in said sleeve and shell, said mixing chamber being incommunication with the interior 01 said pot at its lower end, means toclose said mixing chamber at the asoaess top thereof, and a ringextending inwardly from said shell below the lowermost apertures thereinand overlying a portion oi the bottom of said pot, said ring beingdownwardly and inwardly inclined from said shell whereby in normaloperation air flowing through the apertures in said sleeve and shellwill form aspirating Jets thereby inducing oil vapor from said pot intosaid mixing chamber and into combustible mixture with said air, saidmixture being aspirated into said combustion chamber.

BOYD F. CASTLE.

